Enhanced conductivity of anatase TiO2 nanowires by La and Co co‐doping. (1st April 2020)

• Record Type: Journal Article
• Authors: Li, Shanying; Wang, Zhenxin; Yang, Yilong; Li, Jie; Jin, Chi
• Is Part Of: Micro & nano letters. Volume 15:Number 4(2020)
• Page Start: 226
• Page End: 229
• Publication Date: 2020-04-01
• Subjects: nanofabrication -- electrical conductivity -- nanowires -- carrier density -- titanium compounds -- field effect transistors -- wide band gap semiconductors -- semiconductor doping -- nanoelectronics -- electron‐hole recombination -- carrier mobility -- semiconductor growth -- cobalt -- lanthanum; n‐type conductivity -- carrier concentration -- doped nanowires -- anatase titanium dioxide nanowires -- facile solvothermal process -- as‐synthesised nanowires -- single nanowire field‐effect transistor -- electrical properties -- cobalt codoping method -- lanthanum codoping method -- electrical conductivity -- carrier mobility -- rare earth element doping -- transition element -- bandgap -- electron‐hole recombination -- anatase TiO2 semiconductor materials -- nanoelectronics devices -- TiO2:La, Co; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2019.0621
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract : In this work, the conductivity of anatase titanium dioxide (TiO2 ) nanowires was enhanced by lanthanum (La) and cobalt (Co) co‐doping method. The nanowires were synthesised via a facile solvothermal process. The diameter of as‐synthesised nanowires is about 300 nm and length more than 20 μm. The electrical properties were studied based on single nanowire field‐effect transistor; the anatase TiO2 nanowires exhibit n‐type conductivity with mobility of 2.18 cm 2 V −1 S −1 and carrier concentration of 1.95 × 10 18 cm −3 . Doping of rare earth element La and transition element Co can not only reduce bandgap, but also reduce electron–hole recombination and improve carrier concentration. The distinct electrical properties of doped nanowires will open new opportunities for the application of anatase TiO2 semiconductor materials in nanoelectronics devices.